Space Shuttle Enterprise Exhibition Opens at Intrepid Museum

by Mike Wall, Space.com Senior Writer | January 17, 2013 09:07pm ET

This picture of the International Space Station and the moon was photographed from the space shuttle Atlantis just after the two spacecraft undocked on July 19, 2011, during NASA's final shuttle mission STS-135.Credit: NASA

NASA engineers want to squeeze as much power as possible from the wing-like solar arrays on the International Space Station, and the agency has launched a software contest to make it happen, officials announced today (Jan. 17).

The space agency is sponsoring a $30,000 competition to optimize the position of the station's eight solar arrays during certain parts of its orbit using a software algorithm. The goal is to maximize power output and minimize shadowing of longerons, the long arms holding the arrays to the station, which are sensitive to temperature changes.

With more power at hand, astronauts aboard the $100 billion orbiting lab can perform more experiments, increasing thestation's scientific returns, contest organizers said.

The grand prize for the best software algorithm will win its creator $10,000, while second and third place are worth $5,000 and $3,000, respectively. The top 10 entries will all receive cash, and prizes for certain milestones bring the total purse to $30,000. The top five finishers will also receive mission stickers that orbited Earth aboard thespace shuttle Endeavour.

The International Space Station is powered by eight solar arrays, arranged in pairs of wings, which extend from a central backbone-like truss structure. Each pair of solar arrays is 39 feet (11.8 meters) wide and has a wingspan of nearly 240 feet (73 m). When combined with the station's Russian solar arrays, the outpost's power system generates about 110 kilowatts — enough electricity to power 55 houses, NASA has said.

Registration for the newly announced competition, which runs through Feb. 6, is free and open to all TopCoder members. (TopCoder membership, which currently numbers more than 440,000, is free as well.)

"These are the types of complex low-risk, high-reward problems that get our community of creators excited," Rob Hughes, president and chief operating officer of TopCoder, Inc., said in a statement. "The solutions brought forth for this problem can move the needle for NASA and provide a roadmap for other agencies to tackle stubborn challenges."

Assembly of theInternational Space Stationbegan in 1998, and the orbiting outpost has been continuously occupied by astronauts since November 2000. The station weighs more than 400 tons and spans the area of a football field. It has about as much livable space as a five-bedroom house, or the cabin of a 747 jumbo jet.

Mike Wall

Michael was a science writer for the Idaho National Laboratory and has been an intern at Wired.com, The Salinas Californian newspaper, and the SLAC National Accelerator Laboratory. He has also worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz.